Or search: rex, ramses, ramesses
2 Syllables: SU
families, family's
3 Syllables: SUU
agonies, amnesty, anxiously, batteries, fallacies, fantasies, fantasy, flatteries, galleries, magazines, Majesties, Majesty's, maladies, salaries, strategies, tapestries, tragedies, vanities
4 Syllables: USUU
academies, analogies, calamities, capacities, catastrophes, formalities, realities
5 Syllables: UUSUU
abnormalities, generalities, instantaneously, technicalities

Found 31 words across 4 groupings.